Furnace



Feb. 14, 1928'.

1 658,971 A. COOK FURNACE 7 Filed Feb. 26. 1925' Q 2 sheets-sheet 1 ATroRncY 7 1,658,971 L. A. cooK FURNACE Filed Feb. 26. 1925 2, Sheets-Sheet 2 FIEG' INVENTOR.

AT ORNEY Patented Feb. 14, 1928.

, LOUIS A. COOK, or ames, 01510,

ASSIGNQR o Hnusnnr, A m ORRON 0. oss, F AKRON, QI-IIO. 7

s FURNACE.

' Application filed February This invention relates to draft regulators for furnaces-and tonewaud novel contro1- 'lingineans therefor. Draftregulators have been constructed to operate by anopeningor closing movement of the furnace door a These: devices as'ordinarily constructediare objectionable. inasmuch as the fuel door must the; opened; or partly opened I before the draft. checks and dampers areoperated and as a result smoke and gas escape each. time'the' door iscopenedfi An object of'this invention isntoan automatic :check and. .damperwcontrol whichwill be'operativelysconnectedrto the latch on the fuel door whereby the latch must beoperated and thepipedamper and check draft closed before the fuel door can be opened and to thereby-provide convenient; efficient means for preventing the Lescape of smokeandgas into the furnace room. Anadditional object is, to provide new and improved draftregulating means which is operated by the latch on the furnace door whereby the door willbe v entirely 1 closed be- 5 fore the -checkdamper-151s opened and the flue damper is closed and to thereby provide means for preventing a the escape of smoke and gas during't-he closing movement ofxthe fuel door. I r i Afurther object is to provide a draftregjulat-ing device ,which -is connected to the latch on the fueldoor so that thedraft check' must be opened in order to secure the door in a closed position and to thereby prevent unintentional over-heating of thefurnaoe.

A still further'object is to provide a new and improved check damper whereby the same may be operated as abox' esetforth without interfering with an additional controlling device.

The above objects are accomplished and additional ends are attained by the novel construction, combination and arrangement of parts hereinafter described {and illustrated in the accompanying drawings, wherein I haveshown apreferred form of the invention,- it being understood that the invention is subject to various-adaptations and that changes andanodifications may be made or resort had to the substitutions which come within the scope of the appended. claims; r

In the drawings which form a'partofithis application like characters ofreference are used to'designate like parts asthesame may provide 26, 51925. .iserial: No. 11,737. I

appear in. any ofthe :severalviews and in W c1u+ v v V i Eigure 1. is a front elevational view of a furnacev equipped with an improved regulat- 1I1g 'Cl8V 1CQCO DSUUC CGQ in accordance-with this'invention.

*Eigure 2 is a front elevational view of the CliQClQdllllPQl'. 7, i

Figure' 3 is a perspeetive view of one of the check damper lids employed; incarrying out thisinvention, I 7 Figureris a fragmentary view showing n frontl elevation gtheg upper; port-ion of a furnace equipped. witha draft regulating device I constructed inaccordance with Y this invention. I r I Figure 5 is a sectionalview of ai portion of the furnace 3 door 5 taken as indicated by the lines5-5 of Figure 4. i a

Figu e 6 is sectional view .takenas indicated by the lines.6 6 ofliigure 4.

- Proceeding .nowto adetailed description of the invention withireferenceto tliel pare ticular adaptation thereof discloseddn the drawings, the numeral 7-is .usedg generally to denote a furnace and the numeral Badeaiotes agsmokfigpipe adaptedto lead-to a chimney. -Th6;-;1ll1ln6l2lif '9 denotes a flue leading fronrthe top of'the; fire pot t0;;the smoke ,pipe 8 v and the numeral 10ydenotes the ordinary down draft flue which, connects with the flue 9at a; pointwithin the furnace casin and extends downwardly within the casingthen outwardly and connects with the flue Sat a point in spaced relation below the-flue 9,. ,Thenumeral 11 is used to denote the fuel door and theniumeral 12Qthe ash door. fiThe ;nuineral;13; denotes an. intake draft {door -Which' is hingedly mounted to control 2' the draft opening in the ash door 12.; The numeral M denotes a,check draft pipe whichis-of ordinary construction and whichv sipreferablyi mounted onthe smoke pipe 8, at a point between thevfiues 9 and 10. p

The C1TECkgd1'fiiiii i' l3l136 14L provides an .open avhei'eby jair anay be admitted to the smoke :pipe 8 to check the draft through the furnace. c Theouter;, axial end of the pipe 14. is inclinedand is'provided on the {upper end thereof with suitable ears glfr. which are spaced apart, I to; receive {the lug 16. on the draft, Elid-j 17. ff The l-ugs, ,15 and the ears r16 are,-, provi;ded with alined bores through which is entered a suitable bolt or pin 18 v to hingedlyconnect -lthe 1i d 1'] ;to the; pipe .14.

The I numeral 19 denotes a lid which is preferably composed of sheet metal or other suitable material of light weight. The lid 19 is provided at the upper end thereof with upwardly projecting ears 20 which are bent around the pin 18 to hingedly connect the lid 19 to the pipe 14. The lid 19 is preferably composed of cast iron or other heavy material and the lids Hand 19 are mounted in superposed relation for turning movement on the same axis.

A damper is mounted on a pin 21 and is operatively positioned in the pipe 9 whereby the same when operated will close or partly close the'fiue 9 and direct the smoke and gas through the flue 10 into the smoke pipe 8. The furnace door is provided with outwardly projecting spaced parallel lugs 22 on which is mounted a latch 23. The'latcli 23 and the lugs 22 are provided with alined vertical bores in which is mounted a pin 24 to hingedly connect the latch 23 to the furnace for turning movement in a horizontal plane. The latch 23 is of suiiicient length to project laterally past the forward edge of the door and be entered in the slot 25 in the lug 25 on the door frame. The latch 23 may be provided at the outer end thereof with suitable handle 26. The lugs 22 are spaced apart and the bore in the latch 23 is of sufficient size to permit an upward and downward movement of the latch whereby the same may be lifted to enter or remove the same from the slot 25 in the lug 25. The latch 23 is preferably provided at a point intermediate its length with a downwardly projecting lug 27 in which is formed an eye 28. The numeral 29 denotes a chain or other flexible connecting member which is mounted in the eye 28 and which is operatively positioned over suitable sheaves 30 and is connected to the lever 21 on the damper pin 21. The lever 21 is provided with an enlarged portion 21" to provide a weight which will normally move the damper on the pin 21 to an open position. The lid 19 is provided at a point adjacent the lower end thereof with a laterally projecting car 19*, having an upturned end 19 to which is secured the lower end of the spring 31. The upper end of the spring 31 is connected to the lever 21*. The coil spring 31 is of sufiicient stiffness to operate the lid 19, but does not possess suflicient strength to operate'the lid 17 The lid 17 is provided with a corn trally positioned ear 32 to which is attached one end of a chain 33 which passes over suitable sheaves 3% with the other end thereof connected to one end of the lever 38 on the controlling device 35. The device 35 may be a thermostatic control or may be manually or otherwise operated. The chain 37 is connected to the other end of the lever 38 and the other end. of the chain is connected to the arm 13 on the intake draft door 13.

The chains 33 and 37 are connected to the controlling device 35 so that the lid 32 will be opened when the draft damper 13 is closed and so that the door 13 will be open when the lid 32 is in a closed position. The chain 29 is arranged to close the damper on the pin 21 and open the draft door 19 when the latch 23 in a closed position shown in Figure 1 and is arranged to open the damper on the pin 21 and close the lid 19 when the latch 23 is swung outwardly in the position shown in Figure l. l/Vhile the chain 29 may be connected to the lever 23 to operate as desired I prefer to arrange the same so that a 90 movement of the latch 23 will be sufficient to close the lid 19 and open the damper on the pin 21.

In use, withthe furnace draft positioned as shown in Figure 1, the door is opened by grasping the handle 26 and disengaging the lever 23 from lug 25 and swinging the lever in a forwardly projecting position, whereupon the weight 21 operates the damper on the pin 21 and causes a closing movement of the lid 19: The latch 23 is then usedas a handle to open. the fuel door 11, inasmuch as th damper on the pin 21 has been opened and the lid 19 is closed, the pressure within the furnace is relieved and the door can be opened without gas and smoke escaping therethrough. Likewise the door is swung to a closed position before the latch 23 has exerted a pull on the chain 29, so that the damper on the pin 21 is open and the check 14 is closed during a closing movement of thedoor 11. After the door is closed the latch 23 is swung into the notch 25' on the lug 25,'thus opening the check draft 14 and closing the damper on the pin 21.

Should the control device v35 be operated to open'the door 13 andclose the lid 17, the weight of the lid 17 is sufficient to stretch the spring 31 and close both lids 17 and 1.9 and an operation of the latch 23 will not interfere with the drafts being controlled by the device 35 but will open the damper on the pin 21 without movement of the lid 19.

lVhile I prefer the construction shown in the drawings in which the member 17 is in the form of a lid, it will be seen that the main function of the lid 19 is to act as a weight to overcome the spring 31 andthat the member 17 may be varied in form with out departing from the spirit of the invention.

lVhile T have shown and described my in vention as applied to a heating furnace, it is to be understood that it can be applied to boilersor any form of heating device wherein it is necessary or desirable to regulate the drafts as herein set, forth.

lVhile I have shown a furnace having two smoke lines 9 and 1O, itis obvious that the invention can be applied with equal advantage to furnaces having but one smoke fine.

llif) Ill) Having thus illustrated my invention and described the same in detail, what I claim as new and desire to secure byLetters Pat connecting member secured to said latch at a point in spaced relation to said hinge, said connecting member passing over sheaves with the other end thereof operatively connect-ed to said lid. p 2. In a furnace, a smoke pipe, a damper in said pipe, a fuel door, a catch on the door frame, a latch hingedly connected to said door at a point intermediate itszlength to swing in a horizontal plane, said latch operable to engage said catch to hold said door in a closed position, a flexibleconnecting member secured to said latch at a point in spaced relation to said hinge, the other end of said member connected to said damper whereby the same will be operated by a swinging movement of said latch.

3. In a furnace, in combination, a smoke pipe, a fine leading directly from the smoke outlet of said furnace, to said pipe, a sec ondary flue leading downwardly and outwardly from said outlet and connected to said pipe at a point below said first named line, a damper in said first named flue, a weighted operating arm on said damper, a check opening in said pipe, a lid for said opening, a fuel door, a catch on the door frame, a latch hingedly connected to said door, at a point intermediate its length, to swing in a horizontal plane, said latch operable to engage said catch to hold thedoor in a closed position, flexible connecting member secured to said latch at a point in spaced relation to said hinge, the other end of said member connected to said arm and means connecting said arm to said lid where by an outward swinging movement of said latch will open said damper and close said lid. 1 v

a. In a furnace, in combination, a smoke fine, a normally open damper in said flue, a weightedv operating arm on said damper, a check opening associated with said flue,

combination, a smoke opening, mgs, said lid hinged ad acent one side of a pair ofsuperimposed lids hingedly connected to said flue, said lids being operable to closesaidopening, the upper lid being relatively heavier than the lower lid, a fuel door, a latchhingedly connected to said door to swing in a horizontal plane, a flexible connecting member secured to said latch at a point adjacent the free end thereof, the other, end of said flexible member connected to said arm and means connecting said arm to said lower lid, said means including a coil spring and independent means tooperate said iupperlid.

5. In a furnace, a smoke pipe, having an a lid operable to close said opensaid opening and means connected to the furnace door for operating said lid, said means including a coil spring, a weight hingedly connected to said pipe for swinging movement to and from said lid, said weight being sufiicient to overcome said spring and independentmeans to operate said weight.

6. Ina furnace, a check draftcomprising opening, said lid hingedly connected to said pipe, means to operate said lid, a coil spring interposed in said operating means and additional means to close said lid, said means adapted to engage said catch and hold the door in a closed position and a flexible member connected to said latch at a point adjacent the free end thereof, the other end of said member adapted to be attached to draft checking meansassociated with, the smoke flue ofsaidfurnace.

In testimony whereof I have hereunto set my hand.

LOUIS A. 000

a pipe having an opening, and a lid forsaid 7 

